5 messages · karena, Steve Taylor, jim holtman +1 more
I have a file like this: id n1 n2 n3 n4 n5 n6 1 3 4 7 8 10 2 2 4 1 2 4 3 10 3 7 0 0 0 0 8 4 10 1 0 0 2 3 5 11 1 0 0 0 5 what I want to do is: only if n2=0 and n3=0 and n4=0 and n5=0 then delete the row. how can I do that? thank you, karena
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Hi r-help-bounces at r-project.org napsal dne 13.01.2010 23:15:05:
I have a file like this: id n1 n2 n3 n4 n5 n6 1 3 4 7 8 10 2 2 4 1 2 4 3 10 3 7 0 0 0 0 8 4 10 1 0 0 2 3 5 11 1 0 0 0 5 what I want to do is: only if n2=0 and n3=0 and n4=0 and n5=0 then
delete
the row. how can I do that?
Why do you complicate things for yourself. Few days ago you wanted put zeroes instead of NA values. R has quite extensive capabilities how to handle NA values so your.na.data <- your.data[your.data==0]<-NA # returns NA instead zero values. chosen.one <- complete.cases(your.na.data[,2:5]) # makes a logical vector that is TRUE only if your.na.data does not have NA value in it. your.data[chosen.one,] or your.na.data[chosen.one,] # selects rows without NA values. Or you can use na.omit, na.rm or other NA handling facility provided with many functions. What about to read few pages from R intro manual where you can find how to start with data manipulation. Regards Petr
thank you, karena -- View this message in context:
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thank all of you for the help. to Petr: thanks for the suggestion, I will read the R intro manual. :-)
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